I'm new here, but this thread interested me because I use a spreadsheet too. I think it's pretty easy for anyone to create their own spreadsheet for profit/loss and taxation purposes, no need for a professionally purchased one. Every year I send my accountant a spreadsheet that has:
a shares cost section which includes the details and the cost of purchased shares plus brokerage fees
a shares income section which includes the details and income of sold shares minus brokerage fees
loss/gain as well as % growth against each of the shares
other costs section, which I use for subscription costs related to a charts website I use
other income section, which I use for dividends
At the bottom, I put everything together to show total costs, total income, and total profit/loss. I only do short term trades so that my activity is treated like a business, and my profit/loss is added to my other income (eg. day job) for tax purposes. I don't do long term investments so I avoid CGT.
